Treasurer Gina Raimondo’s campaign war chest now tops $2 million, about three times more than her second-closest rival in the 2014 governor’s race, as the first-term Democrat continues to be a fundraising juggernaut.

Raimondo raised $399,420 from April 1 to June 30, finishing the second quarter with $2.06 million on hand, her campaign disclosed Wednesday in a filing with the R.I. Board of Elections. She had $1.7 million on March 31.

As a comparison, former Treasurer Frank Caprio, who was a prodigious fundraiser in his own right ahead of his 2010 gubernatorial bid, had $1.4 million on hand at the same point in the last election cycle.

Providence Mayor Angel Taveras, Raimondo’s fellow Democrat and another potential candidate for governor next year, raised $157,705 during the second quarter to finish with $692,590 on hand, his campaign disclosed in its Board of Elections filing. Taveras had $560,779 on March 31.

Incumbent Gov. Lincoln Chafee, who won office as a Republican-turned-independent but became a Democrat in May, raised $69,764 and finished the second quarter with $377,391 on hand, Chafee’s campaign disclosed Tuesday in a Board of Elections filing. He had $358,168 on March 31.

Cranston Mayor Allan Fung, who’s expected to seek the Republican nomination for governor, raised $111,050 and finished the quarter with $256,498. Moderate Party founder Ken Block, who’s running for governor and has flirted with joining the GOP, raised $54,414 and finished the quarter with $73,987.

Raimondo continues to rake in more money with each passing quarter, thanks in so small part to a national network of donors, many of whom also hail from the finance industry. She added $399,420 in the second quarter of this year, up from $381,496 in the first quarter and $259,974 in the same period of 2012.

But Raimondo’s campaign operation spent far more money during the second quarter than it had been previous, with total expenses of $59,075 from April 1 to June 30, up from just $17,484 during the first quarter.

The treasurer shelled out $21,500 to Walsworth Landset Research, a political consulting firm co-founded by Brian Walsworth, a former top operative for U.S. House Minority Leader Nancy Pelosi and House Democrats’ campaign arm, the DCCC. The money was spent on polling and research, the filing said.

Raimondo’s campaign also spent more than $200 on taxi rides in New York City, and about $2,000 on catering and flowers in the San Francisco area in May. New York City Mayor Michael Bloomberg held a fundraiser for Raimondo in Manhattan last month.

Among those who donated to Raimondo in the second quarter was Charlie Baker, the Republican candidate for governor in Massachusetts in 2010, who gave the Democratic treasurer $1,000. He is expected to run again in 2014.

Raimondo also received contributions from the political action committees of seven private-sector labor unions, including the Laborers. She got no donations from public-sector unions.

Since entering politics in 2009, Raimondo has raised a cumulative total of $2.85 million in campaign donations.

Separately, Raimondo’s political action committee – Gina PAC – raised only $5,000 during the second quarter but spent $21,105. Most of the money was spent on donations to charities and other politicians, including the campaigns of House Speaker Gordon Fox, Senate President Teresa Paiva Weed and Newark Mayor Cory Booker, her husband’s former roommate, who is now a candidate for U.S. senator in New Jersey.